Ore-roasting furnace.



l. R. MARGEUS E. R. PEMBROME.V

ORE ROASTING FURNACE.

APFLICATION FILED ocT. 23. 1914.

1,145,329. Pmntedmy 6,1915.

|l R. MARGETTS & E. R. PEMBROKE.

OREv ROASTNG FURNACE.

APPLICATION FILED ocT. 23. I9I..

1,145,329. I PaIenIed'JuIy 6, 1915.

2 SHEETS-SHEET 2.

f UNITED N sTATEs PATENT onirica. y

IRVEN n MARGETTS AND-EARL R.. PEMBROKE, orsALT LAKEqcITY, UTAH. y i

oRE-noAsTING FURNAC'E.

To all whom t may concern:

and 4EARL R. PEMBROKE, citizens of the United States,'residing at Salt LakeCity,

in the county of Salt Lake and'State of Utah, have invented certain new and useful Improvements in Ore-Roasting Furnaces, of which the following is a specification.

Our invention relates to certain lnew and useful improvements in machines or apparatus for treating material it` is particularlv adapted in the treatment of Vores or the like, with a reducing, oxidizing, chloriclizing,l or sulfatizing roast, and theinvention consists of the parts and the constructions, arrangements and combinations of parts, which we will hereinafter describe and claim.V

In the accompanying drawings forming part Nof this specification and in which similar reference characters indicate like parts in the several viewsg-Figure l `is a rear elevation of a tray or carrier embodying our invention. Fig. 2 is a side elevation of the' same. Fig." 3 is a plan ,view of the frame Qrsupport for .the formanious bottom of the tray o r car. Fig. 4 is aplan view of the screenV bottom support and screen showing part of the latter'broken away. Fig. y5 is an elevation of the same partly broken away. Fig. 6 is a `plan view of anannular orsegmental vfurnace showing ay plurality of trays or carriers movably mounted thereon. Fig. 7 is a vertical sectional View on the line X--X of Fig.l 6. Fig. 8 is an enlarged vertical section of one of the trays or carriers showing the dumping bottom and coacting parts.

The present invention lhas particular reference to the construction, mounting and operation of the trays or carriers which are each designed to contain a charge 'of ore or other material to be treated. These trays or `cars may be usedv in connectionv with any desired type of furnace. For purposes of illustration we have shown them associatedwith an annular orf/segmental furnace and wherein the saidf'trays or carriers are mounted to travel about a fixed center" or axis, but it ...will be understood that our invention is not invention may be used to advantage.

Vhen using our invention in connection 1 with an annular or segmental furnace, the` Aspeeiacaaon of Letters Patent. y Patnted July 6, 1915 Application led October 23, 1914.` Serial N o. 868,225. y y,

furnace structure may be of any den n,

sired material and as shown in Figs. 6 and 7., said furnace will comprise suitable concentric vor other spaced wallspA, forming between thema chamber, a part 4'of which is ,utilized as a fire-box, B, or combustion chamber, and another part is `employed as -a hot air chamber, and to this end, said chamber B, will befsupplied with a. grate structure, C, of any suitable character' belo which isthe customary ash-pit, D. i

Mounted to travelover4 the furnace sothat the charge of ore may be l successively broughtwithin the 'range'.kof action and thereby subjected to the roasting. heat of the tire in thefire-box, yare a series of trays-or 1 carriers, E, which trays or carriers. are connected by plates, E, of sheet iron or otherwise, which fill the space Vbetween adjacent trays, said trays or carriers being' designed 'to follow each other .in succession, as we will hereinafter describe, and, in the case of the annularl or segmental furnace shown,-the trays or carriers, are designed to moveV about a centralaXis which is herein` shown as in the form 4of a hollow pipe, F, one end of which is adapted to connect, by any suitable means, with a suction fam-#not shown, or

other means, for inducing a draft or suction through said pipe; the upper end `of the pipe, F, is closed and said pipe has radialbranches Gr, which are leach valve-controlled and which radial pipes in turn connect with the interior of the ore tray or carrier bya suitable connection through the inner side the roasting or other treatment of the ore may be drawn off. through the radial pipes and the central stand pipe and-be delivered to a vcondenser or other suitable medium, not

shown.

Ifa furnace `of annular or segmentalV form adopt aV drivingmechanism which kwill inthereof, whereby the gases liberated during ico clude a gear wheel, H, `fixed .to the central e stand pipe or sleeve',l I, and`v engaged and driven by -a pinion, J, on a shaft, which carries a band wheel, J or' like kdevice-'for imparting power-to the gear and vthereby giving rotation to the series of trays or carriers. l I j The trays or carriers', E, areeachprovided with a suitable guide rail or support `which is herein shown in the form of an'inverted edge whereby the bottom may be secured 1n railroad rail, K, said rails being-appropriately secured to the outer sides of the tray or carrier and adapted to be supported upon suitable rollers, L, as shown in Fig. 7. l

Referring to Figs. 14 and 2, where the trays or carriers are shown in detail, it will be seen that each of said trays or carriers is provided with a removable llid or cover, M, which forms a closure for the upper side of the tray, thus inclosing the ore chamber formed inthe tray and 'providing for the removal of the gases through the suction pipes,

G and F, before mentioned. Each ofthe` trays or carriers is also provided with a per- -forated or -foraminousbottom, N. The arrangement ofl this bottom may be as desired,

but for purposes of illustration we have shown, the bottom as of a hinged character;

that is', the bottom is'hinged along one edgev and provided with means along the other its normal horizontal position during the roasting orother treatment of the ore, or

other material, and said bottom may Ibe permitted to tilt downwardly about its hinged 'connection to dump Ithe ore, as We will hereinafter explain.

l The bottom ofeach of the trays comprises j suitabl i -v a support, O, of suitable material and which 3o Lmay be in the formof a grid made either as a solid casting or otherwise constructedto support a screen or foraminous plate, upon which the'oreis supported during its treatment. The character of this foraminous plate is unimportant except that it shall be sufficiently vporous to allowy for a circulation of air o r gases up or. down as the c ase may be through the ore mixture and 4'5- f spring latches, Q, are employed, and which] bottom of thetray, it being understood that the foramina of the plate or bottom shall be vsufiicient to. hold the ore mixture in: place during. the travel of the tray from one point to another. Y

Atone side,"I sayv the side opposite the hinged connection of the bottom, suitable are designed to engage the free side of the i I bottom to thereby'hold the same in a normal'A locked position during the time that the tray is. passing over the fire-box of the furnace,l

and to the point wherethe ore is to be discharged. Approximatelyfat this latter point,

r there is arranged al means for, first, tripping l the spring latches, Q, and thereby permit- 55.

ting the bottom of the tray to tilt downwardly and dump asupported 'charge of ore, and second, other means for restoring'the tilting bottom to its normal position after unloading and during the-travel Iof the tray or carrier to the point where a fresh charge is placed therein.

In Fig/8, we have disclosed an enlarged cross section of one of the trays or carriers, E,in its dumping position, the spring latches having been first engaged by a stationary stop or lug, R, which is interposed in the path of a crank arm, S, or like part fixed to the latches in such manner that as the crank arm engages the lug during the travel of the tray or carrier, the arm is moved thereby rocking the spring latches and releasing the free edge of the hinged bottom of the tray or carrier' and permitting said bottom to` tilt downwardly and thereby discharge the supported load of ore. In the path of travel of the tray or carrier is also arranged suitable means for again closing the door after the lto, the conditions, some powdered coal or charcoal, and all slightly moistened, is put into a tray or .carrier and moved slowly over the fireboX and hot air chamber of the furnace to the desired dumping point, it being understood that the spaces between the trays is filled by the plates, E', in order that there shall be no open spaces passing over i the lire-box.

When using a series of trays in connection with an annular furnace, of the type substantially as shown in Figs. 6 and 7, the series of trays may be yrevolved slowly and continuously or they may be revolved inter-- mittently the Width of a tray at one time. The tray with its charge of ore or other ma-V Aterial is caused to pass over the firev in the fire-box and to be subjected to the action of the same for any required length of time.

As the interior of the tray or carrier connects with'a suction apparatus, and the tray vor carrier isclosed on all sides, it is appar- ,f

ent that the gases` and products of combustion whichaccumulate in the tray above the charge of ore, willbe drawn oi through the radial pipes, G and central stand pipe, F, a suction being maintained if desired, for the purpose of 'creating a draft and circulation through the charge of ore.

As the first of the trays passes the fireboX, the neXt tray of the series will pass over the boX andhave its charge of ore subjected to the roasting action thereof, and' as the preceding tray passes lon the oxidizing or chloridizing, &c., roast once well started progresses toa point, say for a particular ore,-where the damper in the individual suction pipe, G, of that particular tray can be regulated bysome suitable arrangement, as

by an engaging lug, to more or less close the L damper and thereby control the passage through the suction pipe of that particular tray or carrier, or to completely cut off said passage, if desired. They tray passes onward to the point of dumping, which maybe say two divisions back of the lire-box. At

this point the suitably arranged and permanentlyixed lug,R, is located and which is designed to engage with the short lever arm, l

As the tray istmoved one moretray division,

the open bottom engages thestationary or permanently fixed iron, T, vor like part and as it rides over the 'same the dooris closed, but just before reaching its closed position, a second lug, U, engages the lever arm, S, and

rocks the same' so as to retract the spring catches to thereby allow the door to close into its full normal position, after which the lever -arm rides past the lug, U, when the springs cause the catches to assume theirl normal position below and secure the free y edge of said bottom.. At this point, the tray has reached the reloading station, and the tray ahead is being .heated initially.,4 The next movement opens, by some suitablelug arrangement, the damper in the suction p ipe to the tray just loaded and the operation continues similarly and continuously for all trays consecutively. All gases maybe ltaken through the suction pipe and if the process requires it the gases are discharged into a condensing tower, not shown.

From the fore o1ng,1t will be understood 7 that the materia is treated in a continuous operation ,in unit charges or batches by a series of trays or carriers; that these trays or carriers may be of any' desired number and may have anydeslred movement, circular or otherwise, and thatthey are'so arranged that they have movement relative t i to a re-box whereby the ore charge is sub. 50

jected to the action of the heat andl products of combustion in theire-box. It. will also be apparent that the trays or carriers Aare automatically' dumped `consecutively `and,

^ that the dumping bottoms are automatically,

or. otherwise, restored t'o their normal closed l ing a fire-box, of a horizontally traveling. carrier unit designed to receive a charge of windividual charge ofmaterialto be treated,

material to be treated, said unit having a foraminous bottom, 'and means Yfor, moving the unit over theire-box.` I t 2. The combination with a `'furnace having a fire-box, of a series'v of transverselyy 70 connected horizontally traveling .carrier units each designed to 'receive an individual charge of material to befftreated each Iof said units being covered on vtop and having a foraminous bottom,y and meansl whereby said units are caused Y over the {ire-box.

The. combination 'withfafrnace having a fire-box, of a series'of traveling 4car-.- riers each adapted to receive anin'dividual 'charge of materialto be treated, each of said carriers having a bottom adapted to admit furnace gases to the interior of the carrier as said carrier passes over the fire-box, and means whereby said carriers are caused to SUCCGSSVGIY. pass' over said lire-box` l .7.5 to: successively. passt.,

"lr/4.' The combination withafurnace hav-v i mg a fire-box, of a'series of horizontally traveling carrierseach adapted to receive an' and means whereby sald carriers are caused "to successively pass over said fire-box, each of said carriers having a cover.

5. The combination with a furnace having a fire-box, of a series of travelingI car-4 riers'each adapted to receive an individual charge of material to be treated, and meansV whereby said 'carriers are caused to 4succes- `sively pass over ksaid fire-box, each of said carriers havinga dumpingbottom. 6. The combinationwith a furnacehav ing a fire-box,- of a series of traveling roarriers each adaptedk to ,receive Van;.individual charge of material' to be treated, means.

whereby said carriers are caused to succes 105 4 sively pass oversaid lire-box, each of said carriers having a hinged bottom upnwhichy the material is supported, and' releasable latching means engaging said bottomjto hold the same in normal closed position. d

7. .The combination with a furnace having a fire-box open at the top, of a' series l `of `traveling carriersv eachy adapted to'receive an individual` charge .of material ,tof bev treated, said carriers adapted to successively 115 pass over said lfire-box, and having forami- .nousv bottoms upon which "the material sustained'. v

8. The .cmbinationwithfa "furnace havingayfireebox openat the top,`of aseries of .120 l x traveling carriers each adaptedto receive an individual charge;l og-material to be treated,'said carriers adapted to successively pass over said lire-box, andhaving forami- V:no'us'bottoms upon. which the material is 125 f sustained, said bottoms-being hingedly sej`. cured at one'side, and latching devices at theV 4"other side ofthe bottoms for detachably lseycuringvthe'same'.V

9. Thecombinationwith-axfurnacefhav 1301 l ing a fire-box open at the top, of avseries of traveling carriers each adapted to receive an lindividual charge of material to be treated. said carriers adapted to successively pass over said {ire-box, and having foraminous bottoms upon which the material is sustained, said bottoms being hingedly secured at one side, latching devices at the other side of the bottoms for detachably securing the same, and means disposed in the range of ltravel of the carriers for tripping said latching devices.

10. The combination with a furnace having afire-box open at the top, of a series of traveling carriers each adapted to receive an individual charge of material to be treated, said carriers adapted to successively pass over said fire-box, and having foraminous bottoms upon which the material is sustained,'said bottoms being hingedly secured at one side, latching devices at the other side of the bottoms for detachably securing the same, and means for tripping said latching devices to allow the bottoms to dump the treated charge.

11. The combination with a furnace having a fire-box open at the top, of a series of traveling carriers each adapted to receive an individual charge of material to be treated, said carriers adapted to successively pass over said fire-box, and having foraminous bottoms upon which the material is sustained, said bottoms being hingedly secured at one side, latching devices at the other side of the bottoms for detachably securing the same, and means disposed in the path of movement of the carriers for automatically tripping said latching devices.

ment ofthe carriers for automaticallytripping said latching devices, and means for restoring the bottoms to normal closed position after dumping.

13. The combination with a furnace having a {ire-box open at the top, of a series of traveling carriers each adapted to receive for automatically restoring the bottoms to normal closed position.

14. The combination with a furnace having a lire-box open at the top, of a series of traveling carriers each'adapted to receive an individual charge of material to be treated, said carriers adapted to successively pass over said lire-box, and having foraminous bottoms upon which the material is sustained, said bottoms being hingedly secured at one side, latching devices at the other side of the bottoms for detachably securing the same, means dis-posed in the path of movement of the carriers for automatically tripping said latching devices, and means for automatically resetting the hinged bottoms.

15. The combination with a furnace having a fire-box open at the top, of a series of traveling carriers each adapted to receive an individual charge of material to be treated, said carriers adapted to successively pass over said lire-box, and having foraminous bottoms upon which the material is sustained, said bottoms being hingedly secured at one side, and releasable connections between said bottoms and the carriers permitting the bottoms to dump the supported charge.

16. The combination with a furnace having a fire-box, of a series of closed carrier units each designed to receive an individual charge of material to be treated, and means wherebyl said units are caused to successively pass over'the fire-box, each of said carriers having a foraminous bottom, and a suction v 

